[deliverable/linux.git] / arch / x86 / kernel / pmem.c

/*
 * Copyright (c) 2015, Christoph Hellwig.
 * Copyright (c) 2015, Intel Corporation.
 */
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/ioport.h>

static int found(u64 start, u64 end, void *data)
{
	return 1;
}

static __init int register_e820_pmem(void)
{
	struct platform_device *pdev;
	int rc;

	rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
				 IORESOURCE_MEM, 0, -1, NULL, found);
	if (rc <= 0)
		return 0;

	/*
	 * See drivers/nvdimm/e820.c for the implementation, this is
	 * simply here to trigger the module to load on demand.
	 */
	pdev = platform_device_alloc("e820_pmem", -1);
	return platform_device_add(pdev);
}
device_initcall(register_e820_pmem);
Commit	Line	Data
ec776ef6 CH	1	/*
ec776ef6 CH	2	* Copyright (c) 2015, Christoph Hellwig.
9f53f9fa	3	* Copyright (c) 2015, Intel Corporation.
ec776ef6	4	*/
ec776ef6	5	#include <linux/platform_device.h>
9f53f9fa	6	#include <linux/module.h>
bc0d0d09 DW	7	#include <linux/ioport.h>
	8
	9	static int found(u64 start, u64 end, void *data)
	10	{
	11	return 1;
	12	}
ec776ef6	13
9f53f9fa	14	static __init int register_e820_pmem(void)
ec776ef6	15	{
7a67832c	16	struct platform_device *pdev;
bc0d0d09 DW	17	int rc;
bc0d0d09 DW	18
f0f4711a TK	19	rc = walk_iomem_res_desc(IORES_DESC_PERSISTENT_MEMORY_LEGACY,
f0f4711a TK	20	IORESOURCE_MEM, 0, -1, NULL, found);
bc0d0d09 DW	21	if (rc <= 0)
bc0d0d09 DW	22	return 0;
7a67832c DW	23
	24	/*
	25	* See drivers/nvdimm/e820.c for the implementation, this is
	26	* simply here to trigger the module to load on demand.
	27	*/
	28	pdev = platform_device_alloc("e820_pmem", -1);
	29	return platform_device_add(pdev);
ec776ef6	30	}
9f53f9fa	31	device_initcall(register_e820_pmem);